Mercedes E-Class Cabriolet - MPG, running costs & CO2

The 2.0-litre diesel engine in the E 220 d Mercedes E-Class Cabriolet is powerful but shouldn't cost too much to run

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The E 220 d diesel boasts the headline economy figures in the E-Class Cabriolet range. Even with the entry-level diesel fitted, the car is quite pricey to run, with an on-the-road price of more than £40,000 adding a road-tax surcharge in years two to six and the cheaper Audi A5 Cabriolet beating the Mercedes for economy and emissions.

Mercedes E-Class Cabriolet MPG & CO2

Fuel economy of 43.5mpg and emissions of 161g/km of CO2 for the E 220 d are sure to impress private buyers and business drivers alike, with the latter qualifying the luxurious Mercedes for the 27% BiK band. A silky-smooth E 400 d straight-six diesel was introduced in late 2018, replacing the previous E 350 d; it returns 38.2mpg and emits 193g/km.

Go for a petrol engine instead and the 2.0-litre E 300 can manage up to 31mpg but sits in the highest 37% BiK band. The E 450 4MATIC version returns 29.1mpg and emits 208g/km of CO2, while the thirstiest option is the E 53 4MATIC with a twin-turbo 3.0-litre straight-six engine and four-wheel-drive. It also sits in the top BiK band and can return up to 29.4mpg when driven gently.

After the first year's CO2-based road tax (generally included in the on-the-road price), all Mercedes E-Class Cabriolets cost £150 a year to tax. But with a list price (including options) of more than £40,000, all versions are also liable for an additional surcharge of £325 a year in years two to six, bringing the annual bill to £475 during that period.

Insurance groups

Insurance groups for the E-Class Cabriolet are likely to prove costly, with even the E 220 d in group 40 out of 50. The E 450 4MATIC sits in group 44 and the powerful E 53 is in group 47.


Mercedes offers a fairly short three-year warranty, but mileage is unlimited during this period, equalling BMW’s cover and beating Audi’s 60,000-mile warranty.


With the E-Class Cabriolet fitted with premium components and Mercedes being an upmarket brand, servicing isn’t likely to be as cheap as for a more ordinary model, but fixed-price plans are available. Choosing one of these can help spread maintenance costs and avoid unexpected bills.

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